<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>盒模型</title>

  <link rel="stylesheet" href="css/h2.css">

</head>

<body>

  <!-- 基本的盒模型 -->
  <div class="box1">
    盒模型一。。。
  </div>

  <!-- 完整的盒模型 -->
  <div class="box2">
    盒模型二
  </div>
  盒子的下方
  <span class="box2">行内元素</span>
  <span class="box2">不能正确的处理盒模型相关的样式</span>
</body>

</html>